溶剂浸渍树脂的萃取分离性能研究

介绍了溶剂浸渍树脂的制备及性能,阐述了溶剂浸渍树脂在产物提纯和废水处理等分离过程中的应用,并对使用溶剂浸渍树脂处理含酚废水进行了初步研究.     

光缆接续损耗的工程控制

本从影响光纤损耗的主要因素分析着手，提出了光缆接续损耗工程控制的简洁有效的方法。     

从菜西瓜中提取果胶的最佳工艺研究

为确定从菜西瓜中提取果胶的最佳工艺条件,以山西省临汾市菜西瓜为材料,采用酸法进行了提取果胶的试验研究。正交试验结果表明:在萃取时间为45min的前提下,从瓜瓤中提取果胶的最佳工艺条件是加水量为原料重量的4倍,85℃下,添加原料重量0.3％的多聚磷酸钠,果胶得率可达2.03％;从外果皮中提取果胶,加水量为原料重量的4倍,75℃下,添加原料重量0.7％的多聚磷酸钠,果胶得率可达2.98％。     

马兰矿南五采区煤仓施工技术

介绍了马兰矿南五采区煤仓施工方法,认为利用反井钻机施工煤仓,工艺简单、安全高效,同时就煤仓施工中存在的问题提出了建议.     

入侵检测及网络层安全的研究

随着计算机网络的迅速发展，网络安全问题正变得日益重要。文章介绍了计算机网络系统IP层安全概况和入侵者对IP层常采用的入侵手段，以及为防止这种入侵所采取的措施。     

略论中国传统合院住宅形式的固化与沿用

合院式住宅是中国人沿用了二千多年的典型形制，除了其能满足采光、通风的要求和建造相对简化外，中国传统社会早期的中霤祭祀和以五行为基本元素的统括万物的宇宙模式对于中国式合院住宅的固化与沿用，也起了不可忽视的作用。     

尼龙66高强力轻型帘布的开发与应用

神马尼龙66高强力轻型帘布在保持帘布高强力、尺寸稳定性、耐热性、耐疲劳、耐冲击的良好特性的前提下，采用SNT高强度工业丝生产技术，充分挖掘工业丝的强力优势，把富余的强力通过进一步降低纤维密度转化为帘布面积优势的扩大，从而提高轮胎生产的帘布出胎率，使轮胎生产厂享受尼龙66帘布品质的同时，实现降低成本的目的。     

SU-8 3D microoptic components fabricated by inclined UV lithography in water

Out-of-plane microlenses and microoptical fiber holder are two of the most important components for building an integrated microoptic system with a precise alignment accuracy. In this paper, a simple and convenient method to fabricate these components from SU-8 by using inclined UV lithography in water is proposed. It consists of two perpendicular exposures in SU-8 at ±45°. DI water possesses a low absorption coefficient and a moderate and stable value of refractive index in near UV. Using water, the exposure angle in SU-8 can be increased to 50° from 35° in air necessary to pattern the desired 45° slope of the sidewalls. The principle of the proposed technique and the detailed fabrication process of the microoptic components will be presented. The integratability of the fabricated components was demonstrated by the fabrication of the microoptical fiber holder with a pre-aligned out-of-plane microlens.     

Local residence time,residence revolution,and residence volume distributions in twin‐screw extruders

This work was aimed at studying the overall, partial, and local residence time distributions (RTD); overall, partial and local residence revolution distributions (RRD) and overall, partial and local residence volume distributions (RVD) in a co‐rotating twin screw extruder, on the one hand; and establishing the relationships among them, on the other hand. Emphasis was placed on the effects of the type and geometry of mixing elements (a gear block and various types of kneading elements differing in staggering angle) and process parameters on the RTD, RRD and RVD. The overall and partial RTD were directly measured in‐line during the extrusion process and the local ones were calculated by deconvolution based on a statistical theory. The local RTD allowed comparing the mixing performance of mixing elements. Also it was confirmed both experimentally and theoretically that specific throughput, defined as a ratio of throughput (Q) over screw speed (N), controlled all the above three types of residence distributions, be they local, partial or overall. The RRD and RVD do not provide more information on an extrusion process than the corresponding RTD. Rather they are different ways of representing the same phenomena. POLYM. ENG. SCI., 48:19–28, 2008. © 2007 Society of Plastics Engineers     

Hydrothermal Reaction Mechanism and Pathway for the Formation of K2Ti6O13 Nanowires

Calculations and detailed first principle and thermodynamic analyses have been performed to understand the formation mechanism of K₂Ti₆O₁₃ nanowires (NWs) by a hydrothermal reaction between bulk Na₂Ti₃O₇ crystals and a KOH solution. It is found that direct ion exchange between K⁺ and Na⁺ plus H⁺ interactions with [TiO₆] octahedra in Na₂Ti₃O₇ promote the formation of an intermediate H₂K₂Ti₆O₁₄ phase. The large lattice mismatch between this intermediate phase and the bulk Na₂Ti₃O₇ structure, and the large energy reduction associated with the formation of this intermediate phase, drive the splitting of the bulk crystal into H₂K₂Ti₆O₁₄ NWs. However, these NWs are not stable because of large [TiO₆] octahedra distortion and are subject to a dehydration process, which results in uniform K₂Ti₆O₁₃ NWs with narrowly distributed diameters of around 10 nm.